开云体育

The RA Motor on my G-11 is so loose that I have to slap it back into position in order for it to engage the gears. I don't see any way to "tighten" it so it doesn't wobble in and out of the housing. I fear I damaged something by incorrectly transporting the mount sitting on the motor. Does anyone know the correct fix for that? Photo shows the motor in the "out" position.

Hope I'm missing something obvious here, but my GM811 guiding has recently seemed impossible to get sorted. I have occasionally been able to achieve 0.5" guiding, but more typically 0.7"-1.2" with current configuration. After breakdown of RA and Dec, replacement clutch pads (Hermann), relube of all bearings, adjustment of worm meshes, gearbox, PEMPro RA 2x worm PEC, etc, I still can't seem to dial this in. A sample screenshot shows a regular whiplash of DEC, with repeating spikes, which to me indicates some regular periodic roughness of worm gear on the DEC axis? DEC is swinging back and forth here. Could DEC also be affecting the RA numbers? DEC seems to have slight visible play by hand; clutches are tightened about ? turn past touching. Nothing too different than ever. OTA is an SVX140T about 28 lbs with 29 lbs counterweight. Am using an OAG at the scope's FL of about 938mm. Is 57 lbs past the limit of the G8 DEC perhaps? Any thoughts on what to try or adjust? Dale

I uploaded a new version of the spreadsheet "Edward-Gemini-NINA.xlsx" This includes suggestion to enable "Report Pier Side" and "Flip using Goto" per a recent thread on the Gemini group. -- Edward

I do believe this is my first post! The attached unguided guidelog is from my CG-11 with several upgrades including brass worm gear on RA, new OPW blocks both axis, Gemini-II w/HT motors, somewhat recent new factory RA and DEC bearings, recent clean & lube with factory grease, I hope still cleaned/dry clutch pads, clutches minimally tight, 200mmFL guidescope. About 45 minutes of unguided time under below average seeing. The PE is rather high and looks to me jaggy, (and I wonder if that's indicative of mechanical, seeing or what.) On a good night I see about 0.75-1.0" rms in PHD2 and am currently imaging at 1.13" and 0.75", so I'd like to see if there's anything I can do to improve performance before I buy PEMpro and create a PEC curve. Yesterday I removed and checked gearboxes/motors, also re-tightened oldham coupler set screws. Adjusted worm mesh but with the OPW this was just by feel - I simply push the worm into the wheel lightly and tighten everything down and if there is no stall I figure it's good - any advice appreciated! Tonights experiment: if the clouds cooperate, playing with the RA worm mesh after sundown and mount cooldown as previously I'm adjusting at room temp which I know is not smart. -- Thanks, Topher

Hello, I bought an RA extension and 12" pier extension for my g11. The goal was to improve meridian flips with my 130mm refractor. I checked all the screws in both components and they are tight. Guuding was good before the extensions .3 to .7 I. Both RA and DEC. Now, DEC is still good, right now it's 0.4 but RA is 1.5, 1.8, 2.2 or more. Last light after the flip it improved. Tonight I moved the CW to make it east heavy. That did not really help. I have tried adjusting the aggression but that doesn't make much difference (I use an ASIAIR). Again, the problems started with the new RA and pier extensions. I hate to lose the first clear nights in two months so any suggestions are appreciated. Tom

I sent my mount in within the past 6 months to get the L6 upgrade, ra/dec extension, and springloaded worm addong. I started noticing after this it is taking forever to get calibration and after East/West calibration it takes several minutes to clear the backlash ( I get an error that Ra/dec rates differ by unexpected amounts). I did a guide assist and measured my dec backlash which gave me this is the result. I am not entirely sure how to fix this or go about adjusting the spring or the dec gears. Any advice is greatly appreciated. My initial guide calibration used to take 1-2 minutes maybe 5 at most. Now its 5-10 minutes. I get the error every time, I will discard the calibration 2-3 times before I can get a good calibration.

Yesterday I was balancing my 2008 Losmandy G11, Gemini-1 using servo-motor current draw to fine tune the balance. At one point I used the hand controller to move the telescope to point at the celestial pole with counterweight down. As it neared that position the mount gave a continuous tone like when a safety limit is reached. That was puzzling since it wasn't anywhere near the limit. So I switched the Gemini-1 off, thinking it just needed a reboot. When I turned it back on there was no response, no startup beep, no lights on Gemini electronics chassis or hand controller. Then I saw the 17-volt power had no lights. So it seemed the power supply had died. So I brought out my old Pyramid 13.8 volt power supply and hooked it up. It too had the same symptom - when Gemini-1 was switched on, the power supply lights for voltage and current went off. So two power supplies had same symptom - not supplying power with all lights on or connected to the Gemini-1 all lights go off. It's clear the problem lies with the Gemini-1, perhaps something like a dead short. I'll give another try today to see if a day's rest has corrected the problem. But the prognosis isn't good. Does anyone know if there is something that I can do, like a resettable circuit breaker or fuse? I'll be contacting Michael Herman to see if he can resurrect my old Gemini-1. If that fails, perhaps buying a used Gemini-1 or new Gemini-2 would be the path forward. My 17 year old Losmandy G11 has been a stalwart in my astronomy adventure. It now resides inside Ocean Observatory, with slide off roof. Presently the G11 is carrying a Celestron-8 with AT115EDT triplet refractor, like what is shown below. So as can be expected, I'm eager to get my old Losmandy G11/G-1 back in service. Best Regards, Russ

I just received an axis upgrade for the G11T. Travel, poor weather, and stuff still coming in for my imaging setup will prevent me from putting everything through its paces. For G11T (with Titan RA axis) users out there, do you guide east heavy with this mount? I realize experiences may differ, but I'm wondering whether or not some or most users see guiding improvement this way specifically in RA. Regards, George

Hello All I am a brand new user of Losmandy mounts. My past experience with GEMs has been limited to the iOptron SGP and the Vixen GPDX. I recently acquired a Celestron Losmandy G11. I tried to counterbalance my setup today and had a clarification about the RA axis. No matter how much I tighten the RA clutch knob I am unable to fully lock the RA axis movement (and I really tightened the clutch). The Dec axis is fine....I am able to fully lock down that axis when I tighten the Dec clutch. Is this normal ? As an example when I deliberately throw the RA axis off balance by moving the 11lb counterweight all the way towards the end of the shaft, the mount easily rotates about the RA axis even when fully tightened down. This has definitely not been my experience on the other gems I have used... Would appreciate any advice. Sincerely Avi